Sprint is schooling AT&T and telling the wireless carrier how it can increase its wireless network capacity by a whopping 600%.

In a letter to the FCC, Sprint tells the regulatory agency that AT&T does not have to buy T-Mobile to improve its network capacity. All it has to do is install more cell towers and upgrade its network to LTE. It's a simple solution that Sprint hopes will derail the impending merger of the nation's #1 and #4 wireless carriers.

Sprint has a reason to fight for the rights of itself and consumers. The merger will put Verizon and AT&T/T-Mobile in control of 88% of the wireless market in the US.